Combined punching and forging machine



(No Model.) v 2'Sheets-Sheet 1. J P SIBGFRIED.

COMBINED PUNGHING AND FORGING MACHINE. No. 292,262. Patented Ja'IL'ZZ,18.824.-

' WITNESSES INVENTQR I ATTORNEYS (No Model.) 2 sheets-4mm 2.

- J. P. SIEG PRIED.

-GOMBINEDPUNGHING AND FORGING MACHINE.

No.f292,262. I Patented Jan.22, 1884.

7 WI mzssn s I INVENTOR N. PETERi FhuloLillwgmpher, wamin twv, 1C

" eams STATES PATENT Grime n JOHN P. smernmn, or TOLEDO, OHIO.

COMB INED PUNCHING AND FORGING MACHlNE.

' SPECIFICATION formingpart of Letters Patent No. 292,262, dated January22, 1884,

Application filed July 3,1833. (No model.) I

T at whom, it may concern.-

Be it known that 1, JOHN P. SIEGFRIED, of Toledo, in the county of Lucasand" State of Ohio, have invented certain newand useful Improvements inCombined Punching and Forging Machines; and I do hereby declare" thefollowing to be afull, clear, and exact description of the invention,such as will enable others skilled in the art to which it pertains tomake and use the same.

My invention relates to improvements in a combined punching and forgingmachine and it consists in certain features of construction and in thecombination of parts hereinafter described, and pointed out in theclaims.

In manufacturing various tools it is necessary to punch a hole in someportion of the metal and to form a thimble around the hole on one sideof the metal plate adapted to receive and support a handle. Hoes of thekind shown in the drawings and picks may be cited as familiar examples.The thickness of the plate where the hole is to be punched should besuch that the surplus metal had in making the hole will, if properlytreated, form the said thimble, and at the same time remain integralwith the plate.

' In the drawings, Figure 1 is a side elevation, and Fig. 2 a frontelevation, of my new machine. Fig. 3 is a vertical section, and Fig. 4 aplan view in detail. Fig. 5 is a view in perspective ,of a variety ofhoes that may be punched on the machine.

A represents a supporting-frame, to which is attached the anvil A, thatsupports the punch a. To the upper portion of this frame is journaledthe double-crank shaft B, having,

' however,but a single throw-+that is, the cranks throw in unison.Connected with this part of the device are gears, counter-shaft,driving; pulley, clutch, and whatever may benecessary in transmittingpower to the machine and regulating the motion thereof. These cranks areprovided with the pitmen G, that are con nected with and reciprocatevertically the die D, that embraces and is guided by the slide E.

Attached to the shaft B is the bevel-gear b, engaging the gear f,attached to the shaft Fby a feather and groove or other suitable means,so that the shaft may reciprocate (simultaneously with the die D, towhich it is attached) through the gear f and the contiguous box. Theshaft F is journaled in the box f and in the bail d, and is held endwiseby collars attached to the shaft on either side of the said bail, sothat the shaft always retains its relative position vertically to thedie D. The

lower end of the shaft F is made broad, and is shaft F is revolved, thehammers G, by meansof the respective arms coming in contact with theinclines d, will first be opened or thrown apart, and as the said armsleave the points of their respective engaging-cams the springs y willcause the hammers to strike both sides of the intervening metalsimultaneously, and these two blows will be repeated four times duringeach revolution of the shaft F. Of course a greater number of inclinescould be used, if necessary 5 also, the gear I) might be increased andthe gear f decreased in size, so that any desired number of strokes ofthe hammers may be had during one reciprocation of the die D.

The operation of my device is as follows: While the die D is raised, thepiece of metal that it is to be operated upon, properly heated,

is placed in the required position on the punch a and the machine set inmotion. The .de*

.scendin'g die forces the piece of metal down ous blows on the metalthat is forced up around the punch, forming it into a thimble. The innerpart of this thimble of course conforms to the shape of the punch, whilethe outside of the thimble will be found to be more tapering than theinside and thinner at '3. The hammers G, the springs g, and the 15inclines d, in combination with the revolving and reciprocating shaft F,substantially as shown and described.

In testimony whereof I sign this specification, in the presence of twowitnesses, this 26th day ofJunc, 1883.

JOHN P. SIEGFRIED.

\Vitnesses:

.Tosnrn W. les'r, FRED A. ALLEN.

